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view src/http/modules/ngx_http_ssl_module.h @ 7054:e02555553d0b

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Range filter: protect from total size overflows. The overflow can be used to circumvent the restriction on total size of ranges introduced in c2a91088b0c0 (1.1.2). Additionally, overflow allows producing ranges with negative start (such ranges can be created by using a suffix, "bytes=-100"; normally this results in 200 due to the total size check). These can result in the following errors in logs: [crit] ... pread() ... failed (22: Invalid argument) [alert] ... sendfile() failed (22: Invalid argument) When using cache, it can be also used to reveal cache file header. It is believed that there are no other negative effects, at least with standard nginx modules. In theory, this can also result in memory disclosure and/or segmentation faults if multiple ranges are allowed, and the response is returned in a single in-memory buffer. This never happens with standard nginx modules though, as well as known 3rd party modules. Fix is to properly protect from possible overflow when incrementing size.
author Maxim Dounin <mdounin@mdounin.ru>
date Tue, 11 Jul 2017 16:06:23 +0300
parents 51e1f047d15d
children ba971deb4b44
line wrap: on
line source


/*
 * Copyright (C) Igor Sysoev
 * Copyright (C) Nginx, Inc.
 */


#ifndef _NGX_HTTP_SSL_H_INCLUDED_
#define _NGX_HTTP_SSL_H_INCLUDED_


#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_http.h>


typedef struct {
    ngx_flag_t                      enable;

    ngx_ssl_t                       ssl;

    ngx_flag_t                      prefer_server_ciphers;

    ngx_uint_t                      protocols;

    ngx_uint_t                      verify;
    ngx_uint_t                      verify_depth;

    size_t                          buffer_size;

    ssize_t                         builtin_session_cache;

    time_t                          session_timeout;

    ngx_array_t                    *certificates;
    ngx_array_t                    *certificate_keys;

    ngx_str_t                       dhparam;
    ngx_str_t                       ecdh_curve;
    ngx_str_t                       client_certificate;
    ngx_str_t                       trusted_certificate;
    ngx_str_t                       crl;

    ngx_str_t                       ciphers;

    ngx_array_t                    *passwords;

    ngx_shm_zone_t                 *shm_zone;

    ngx_flag_t                      session_tickets;
    ngx_array_t                    *session_ticket_keys;

    ngx_flag_t                      stapling;
    ngx_flag_t                      stapling_verify;
    ngx_str_t                       stapling_file;
    ngx_str_t                       stapling_responder;

    u_char                         *file;
    ngx_uint_t                      line;
} ngx_http_ssl_srv_conf_t;


extern ngx_module_t  ngx_http_ssl_module;


#endif /* _NGX_HTTP_SSL_H_INCLUDED_ */